| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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| 7 | <!ENTITY linux-pam-download-http "https://github.com/linux-pam/linux-pam/releases/download/v&linux-pam-version;/Linux-PAM-&linux-pam-version;.tar.xz">
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| 8 | <!ENTITY linux-pam-download-ftp " ">
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| 9 | <!ENTITY linux-pam-md5sum "51d8ef45f050418c8ac5c1636efe5731">
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| 10 | <!ENTITY linux-pam-size "952 KB">
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| 11 | <!ENTITY linux-pam-buildsize "35 MB (with tests)">
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| 12 | <!ENTITY linux-pam-time "0.4 SBU (with tests)">
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| 13 |
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| 14 | <!ENTITY linux-pam-docs-download "https://github.com/linux-pam/linux-pam/releases/download/v&linux-pam-version;/Linux-PAM-&linux-pam-docs-version;-docs.tar.xz">
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| 15 | <!ENTITY linux-pam-docs-md5sum "1d05dda7dc2e275c226d9a4076dad66e">
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| 16 | <!ENTITY linux-pam-docs-size "432 KB">
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| 17 | <!--
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| 18 | <!ENTITY debian-pam-docs "http://debian.securedservers.com/kernel/pub/linux/libs/pam">
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| 19 | -->
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| 20 | ]>
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| 21 |
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| 22 | <sect1 id="linux-pam" xreflabel="Linux-PAM-&linux-pam-version;">
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| 23 | <?dbhtml filename="linux-pam.html"?>
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| 24 |
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| 25 | <sect1info>
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| 26 | <othername>$LastChangedBy$</othername>
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| 27 | <date>$Date$</date>
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| 28 | </sect1info>
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| 29 |
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| 30 | <title>Linux-PAM-&linux-pam-version;</title>
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| 31 |
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| 32 | <indexterm zone="linux-pam">
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| 33 | <primary sortas="a-Linux-PAM">Linux-PAM</primary>
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| 34 | </indexterm>
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| 35 |
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| 36 | <sect2 role="package">
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| 37 | <title>Introduction to Linux PAM</title>
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| 38 |
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| 39 | <para>
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| 40 | The <application>Linux PAM</application> package contains
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| 41 | Pluggable Authentication Modules used to enable the local
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| 42 | system administrator to choose how applications authenticate
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| 43 | users.
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| 44 | </para>
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| 45 |
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| 46 | &lfs10_checked;
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| 47 |
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| 48 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 49 | <itemizedlist spacing="compact">
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| 50 | <listitem>
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| 51 | <para>
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| 52 | Download (HTTP): <ulink url="&linux-pam-download-http;"/>
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| 53 | </para>
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| 54 | </listitem>
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| 55 | <listitem>
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| 56 | <para>
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| 57 | Download (FTP): <ulink url="&linux-pam-download-ftp;"/>
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| 58 | </para>
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| 59 | </listitem>
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| 60 | <listitem>
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| 61 | <para>
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| 62 | Download MD5 sum: &linux-pam-md5sum;
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| 63 | </para>
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| 64 | </listitem>
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| 65 | <listitem>
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| 66 | <para>
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| 67 | Download size: &linux-pam-size;
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| 68 | </para>
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| 69 | </listitem>
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| 70 | <listitem>
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| 71 | <para>
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| 72 | Estimated disk space required: &linux-pam-buildsize;
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| 73 | </para>
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| 74 | </listitem>
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| 75 | <listitem>
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| 76 | <para>
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| 77 | Estimated build time: &linux-pam-time;
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| 78 | </para>
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| 79 | </listitem>
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| 80 | </itemizedlist>
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| 81 |
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| 82 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 83 | <itemizedlist spacing="compact">
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| 84 | <title>Optional Documentation</title>
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| 85 | <listitem>
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| 86 | <para>
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| 87 | Download (HTTP): <ulink url="&linux-pam-docs-download;"/>
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| 88 | </para>
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| 89 | </listitem>
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| 90 | <listitem>
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| 91 | <para>
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| 92 | Download MD5 sum: &linux-pam-docs-md5sum;
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| 93 | </para>
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| 94 | </listitem>
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| 95 | <listitem>
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| 96 | <para>
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| 97 | Download size &linux-pam-docs-size;
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| 98 | </para>
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| 99 | </listitem>
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| 100 | </itemizedlist>
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| 101 |
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| 102 | <bridgehead renderas="sect3">Linux PAM Dependencies</bridgehead>
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| 103 |
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| 104 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 105 | <para role="optional">
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| 106 | <xref linkend="db"/>,
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| 107 | <xref linkend="libnsl"/>,
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| 108 | <xref linkend="libtirpc"/>,
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| 109 | <ulink url="https://github.com/linux-audit/audit-userspace">libaudit</ulink>, and
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| 110 | <ulink url="http://www.prelude-siem.org">Prelude</ulink>
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| 111 | </para>
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| 112 |
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| 113 | <bridgehead renderas="sect4">Optional (To Rebuild the Documentation)</bridgehead>
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| 114 | <para role="optional">
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| 115 | <xref linkend="DocBook"/>,
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| 116 | <xref linkend="docbook-xsl"/>,
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| 117 | <xref linkend="fop"/>,
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| 118 | <xref linkend="libxslt"/> and either
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| 119 | <xref linkend="lynx"/> or
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| 120 | <ulink url="&w3m-url;">W3m</ulink>
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| 121 | </para>
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| 122 |
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| 123 | <note>
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| 124 | <para role="required">
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| 125 | <xref role="runtime" linkend="shadow"/>
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| 126 | <phrase revision="systemd"> and <xref role="runtime" linkend="systemd"/>
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| 127 | need</phrase><phrase revision="sysv">needs</phrase> to be reinstalled
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| 128 | after installing and configuring <application>Linux PAM</application>.
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| 129 | </para>
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| 130 |
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| 131 | <para role="recommended">
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| 132 | With Linux-PAM-1.4.0 and higher, the pam_cracklib module is not
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| 133 | installed by default. To enforce strong passwords, it is recommended
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| 134 | to use <xref role="runtime" linkend="libpwquality"/>.
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| 135 | </para>
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| 136 | </note>
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| 137 |
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| 138 | <para condition="html" role="usernotes">User Notes:
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| 139 | <ulink url="&blfs-wiki;/linux-pam"/>
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| 140 | </para>
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| 141 | </sect2>
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| 142 |
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| 143 | <sect2 role="installation">
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| 144 | <title>Installation of Linux PAM</title>
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| 145 |
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| 146 | <para revision="sysv">
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| 147 | First prevent the installation of an unneeded systemd file:
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| 148 | </para>
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| 149 |
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| 150 | <screen revision="sysv"><userinput>sed -e /service_DATA/d \
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| 151 | -i modules/pam_namespace/Makefile.am &&
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| 152 | autoreconf</userinput></screen>
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| 153 |
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| 154 | <para>
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| 155 | If you downloaded the documentation, unpack the tarball by issuing
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| 156 | the following command.
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| 157 | </para>
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| 158 |
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| 159 | <screen><userinput>tar -xf ../Linux-PAM-&linux-pam-docs-version;-docs.tar.xz --strip-components=1</userinput></screen>
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| 160 |
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| 161 | <para>
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| 162 | If you instead want to regenerate the documentation, fix the
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| 163 | <command>configure</command> script so that it detects lynx if installed:
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| 164 | </para>
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| 165 |
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| 166 | <screen><userinput>sed -e 's/dummy elinks/dummy lynx/' \
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| 167 | -e 's/-no-numbering -no-references/-force-html -nonumbers -stdin/' \
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| 168 | -i configure</userinput></screen>
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| 169 |
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| 170 | <para>
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| 171 | Install <application>Linux PAM</application> by
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| 172 | running the following commands:
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| 173 | </para>
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| 174 |
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| 175 | <screen><userinput>./configure --prefix=/usr \
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| 176 | --sysconfdir=/etc \
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| 177 | --libdir=/usr/lib \
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| 178 | --enable-securedir=/lib/security \
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| 179 | --docdir=/usr/share/doc/Linux-PAM-&linux-pam-version; &&
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| 180 | make</userinput></screen>
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| 181 |
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| 182 | <para>
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| 183 | To test the results, a suitable <filename>/etc/pam.d/other</filename>
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| 184 | configuration file must exist.
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| 185 | </para>
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| 186 |
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| 187 | <caution>
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| 188 | <title>Reinstallation or upgrade of Linux PAM</title>
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| 189 | <para>
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| 190 | If you have a system with Linux PAM installed and working, be careful
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| 191 | when modifying the files in
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| 192 | <filename class="directory">/etc/pam.d</filename>, since your system
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| 193 | may become totally unusable. If you want to run the tests, you do not
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| 194 | need to create another <filename>/etc/pam.d/other</filename> file. The
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| 195 | installed one can be used for that purpose.
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| 196 | </para>
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| 197 |
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| 198 | <para>
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| 199 | You should also be aware that <command>make install</command>
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| 200 | overwrites the configuration files in
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| 201 | <filename class="directory">/etc/security</filename> as well as
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| 202 | <filename>/etc/environment</filename>. In case you
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| 203 | have modified those files, be sure to back them up.
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| 204 | </para>
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| 205 | </caution>
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| 206 |
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| 207 | <para>
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| 208 | For a first installation, create the configuration file by issuing the
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| 209 | following commands as the <systemitem class="username">root</systemitem>
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| 210 | user:
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| 211 | </para>
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| 212 |
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| 213 | <screen role="root"><userinput>install -v -m755 -d /etc/pam.d &&
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| 214 |
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| 215 | cat > /etc/pam.d/other << "EOF"
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| 216 | <literal>auth required pam_deny.so
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| 217 | account required pam_deny.so
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| 218 | password required pam_deny.so
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| 219 | session required pam_deny.so</literal>
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| 220 | EOF</userinput></screen>
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| 221 |
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| 222 | <para>
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| 223 | Now run the tests by issuing <command>make check</command>.
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| 224 | Ensure there are no errors produced by the tests before continuing the
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| 225 | installation. Note that the checks are quite long. It may be useful to
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| 226 | redirect the output to a log file in order to inspect it thoroughly.
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| 227 | </para>
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| 228 |
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| 229 | <para>
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| 230 | Only in case of a first installation, remove the configuration file
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| 231 | created earlier by issuing the following command as the
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| 232 | <systemitem class="username">root</systemitem> user:
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| 233 | </para>
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| 234 |
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| 235 | <screen role="root"><userinput>rm -fv /etc/pam.d/other</userinput></screen>
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| 236 |
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| 237 | <para>
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| 238 | Now, as the <systemitem class="username">root</systemitem>
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| 239 | user:
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| 240 | </para>
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| 241 |
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| 242 | <screen role="root"><userinput>make install &&
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| 243 | chmod -v 4755 /sbin/unix_chkpwd &&
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| 244 |
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| 245 | for file in pam pam_misc pamc
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| 246 | do
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| 247 | mv -v /usr/lib/lib${file}.so.* /lib &&
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| 248 | ln -sfv ../../lib/$(readlink /usr/lib/lib${file}.so) /usr/lib/lib${file}.so
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| 249 | done</userinput></screen>
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| 250 |
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| 251 | </sect2>
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| 252 |
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| 253 | <sect2 role="commands">
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| 254 | <title>Command Explanations</title>
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| 255 |
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| 256 | <para>
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| 257 | <parameter>--enable-securedir=/lib/security</parameter>:
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| 258 | This switch sets install location for the
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| 259 | <application>PAM</application> modules.
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| 260 | </para>
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| 261 |
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| 262 | <para>
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| 263 | <option>--disable-regenerate-docu</option> : If the needed dependencies
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| 264 | (<xref linkend="DocBook"/>, <xref linkend="docbook-xsl"/>, <xref
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| 265 | linkend="libxslt"/>, and <xref linkend="lynx"/> or <ulink
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| 266 | url="&w3m-url;">W3m</ulink>) are installed, the manual pages, and the
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| 267 | html and text documentations are (re)generated and installed.
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| 268 | Furthermore, if <xref linkend="fop"/> is installed, the PDF
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| 269 | documentation is generated and installed. Use this switch if you do not
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| 270 | want to rebuild the documentation.
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| 271 | </para>
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| 272 |
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| 273 | <para>
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| 274 | <command>chmod -v 4755 /sbin/unix_chkpwd</command>:
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| 275 | The <command>unix_chkpwd</command> helper program must be setuid
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| 276 | so that non-<systemitem class="username">root</systemitem>
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| 277 | processes can access the shadow file.
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| 278 | </para>
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| 279 |
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| 280 | </sect2>
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| 281 |
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| 282 | <sect2 role="configuration">
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| 283 | <title>Configuring Linux-PAM</title>
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| 284 |
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| 285 | <sect3 id="pam-config">
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| 286 | <title>Config Files</title>
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| 287 |
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| 288 | <para>
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| 289 | <filename>/etc/security/*</filename> and
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| 290 | <filename>/etc/pam.d/*</filename>
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| 291 | </para>
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| 292 |
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| 293 | <indexterm zone="linux-pam pam-config">
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| 294 | <primary sortas="e-etc-security">/etc/security/*</primary>
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| 295 | </indexterm>
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| 296 |
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| 297 | <indexterm zone="linux-pam pam-config">
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| 298 | <primary sortas="e-etc-pam.d">/etc/pam.d/*</primary>
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| 299 | </indexterm>
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| 300 |
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| 301 | </sect3>
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| 302 |
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| 303 | <sect3>
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| 304 | <title>Configuration Information</title>
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| 305 |
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| 306 | <para>
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| 307 | Configuration information is placed in
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| 308 | <filename class="directory">/etc/pam.d/</filename>.
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| 309 | Below is an example file:
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| 310 | </para>
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| 311 |
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| 312 | <screen><literal># Begin /etc/pam.d/other
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| 313 |
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| 314 | auth required pam_unix.so nullok
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| 315 | account required pam_unix.so
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| 316 | session required pam_unix.so
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| 317 | password required pam_unix.so nullok
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| 318 |
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| 319 | # End /etc/pam.d/other</literal></screen>
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| 320 |
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| 321 | <para>
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| 322 | Now set up some generic files. As root:
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| 323 | </para>
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| 324 |
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| 325 | <screen role="root"><userinput>install -vdm755 /etc/pam.d &&
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| 326 | cat > /etc/pam.d/system-account << "EOF" &&
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| 327 | <literal># Begin /etc/pam.d/system-account
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| 328 |
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| 329 | account required pam_unix.so
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| 330 |
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| 331 | # End /etc/pam.d/system-account</literal>
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| 332 | EOF
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| 333 |
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| 334 | cat > /etc/pam.d/system-auth << "EOF" &&
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| 335 | <literal># Begin /etc/pam.d/system-auth
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| 336 |
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| 337 | auth required pam_unix.so
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| 338 |
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| 339 | # End /etc/pam.d/system-auth</literal>
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| 340 | EOF
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| 341 |
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| 342 | cat > /etc/pam.d/system-session << "EOF"
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| 343 | <literal># Begin /etc/pam.d/system-session
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| 344 |
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| 345 | session required pam_unix.so
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| 346 |
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| 347 | # End /etc/pam.d/system-session</literal>
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| 348 | EOF
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| 349 | cat > /etc/pam.d/system-password << "EOF"
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| 350 | <literal># Begin /etc/pam.d/system-password
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| 351 |
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| 352 | # use sha512 hash for encryption, use shadow, and try to use any previously
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| 353 | # defined authentication token (chosen password) set by any prior module
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| 354 | password required pam_unix.so sha512 shadow try_first_pass
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| 355 |
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| 356 | # End /etc/pam.d/system-password</literal>
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| 357 | EOF
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| 358 | </userinput></screen>
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| 359 |
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| 360 | <para>
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| 361 | If you wish to enable strong password support, install
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| 362 | <xref linkend="libpwquality"/>, and follow the
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| 363 | instructions in that page to configure the pam_pwquality
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| 364 | PAM module with strong password support.
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|---|
| 365 | </para>
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| 366 |
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| 367 | <!-- With the removal of the pam_cracklib module, we're supposed to be using
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| 368 | libpwquality. That already includes instructions in it's configuration
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| 369 | information page, so we'll use those instead.
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| 370 |
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| 371 | Linux-PAM must be installed prior to libpwquality so that PAM support
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| 372 | is built in, and the PAM module is built.
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| 373 | -->
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| 374 | <!--
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| 375 | <para>
|
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| 376 | The remaining generic file depends on whether <xref
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| 377 | linkend="cracklib"/> is installed. If it is installed, use:
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| 378 | </para>
|
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| 379 |
|
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| 380 | <screen role="root"><userinput>cat > /etc/pam.d/system-password << "EOF"
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| 381 | <literal># Begin /etc/pam.d/system-password
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| 382 |
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| 383 | # check new passwords for strength (man pam_cracklib)
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| 384 | password required pam_cracklib.so authtok_type=UNIX retry=1 difok=5 \
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| 385 | minlen=9 dcredit=1 ucredit=1 \
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| 386 | lcredit=1 ocredit=1 minclass=0 \
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| 387 | maxrepeat=0 maxsequence=0 \
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| 388 | maxclassrepeat=0 \
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| 389 | dictpath=/lib/cracklib/pw_dict
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| 390 | # use sha512 hash for encryption, use shadow, and use the
|
|---|
| 391 | # authentication token (chosen password) set by pam_cracklib
|
|---|
| 392 | # above (or any previous modules)
|
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| 393 | password required pam_unix.so sha512 shadow use_authtok
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| 394 |
|
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| 395 | # End /etc/pam.d/system-password</literal>
|
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| 396 | EOF</userinput></screen>
|
|---|
| 397 |
|
|---|
| 398 | <note>
|
|---|
| 399 | <para>
|
|---|
| 400 | In its default configuration, pam_cracklib will
|
|---|
| 401 | allow multiple case passwords as short as 6 characters, even with
|
|---|
| 402 | the <parameter>minlen</parameter> value set to 11. You should review
|
|---|
| 403 | the pam_cracklib(8) man page and determine if these default values
|
|---|
| 404 | are acceptable for the security of your system.
|
|---|
| 405 | </para>
|
|---|
| 406 | </note>
|
|---|
| 407 |
|
|---|
| 408 | <para>
|
|---|
| 409 | If <xref linkend="cracklib"/> is <emphasis>NOT</emphasis> installed,
|
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| 410 | use:
|
|---|
| 411 | </para>
|
|---|
| 412 |
|
|---|
| 413 | <screen role="nodump"><userinput>cat > /etc/pam.d/system-password << "EOF"
|
|---|
| 414 | <literal># Begin /etc/pam.d/system-password
|
|---|
| 415 |
|
|---|
| 416 | # use sha512 hash for encryption, use shadow, and try to use any previously
|
|---|
| 417 | # defined authentication token (chosen password) set by any prior module
|
|---|
| 418 | password required pam_unix.so sha512 shadow try_first_pass
|
|---|
| 419 |
|
|---|
| 420 | # End /etc/pam.d/system-password</literal>
|
|---|
| 421 | EOF</userinput></screen>
|
|---|
| 422 | -->
|
|---|
| 423 | <para>
|
|---|
| 424 | Now add a restrictive <filename>/etc/pam.d/other</filename>
|
|---|
| 425 | configuration file. With this file, programs that are PAM aware will
|
|---|
| 426 | not run unless a configuration file specifically for that application
|
|---|
| 427 | is created.
|
|---|
| 428 | </para>
|
|---|
| 429 |
|
|---|
| 430 | <screen role="root"><userinput>cat > /etc/pam.d/other << "EOF"
|
|---|
| 431 | <literal># Begin /etc/pam.d/other
|
|---|
| 432 |
|
|---|
| 433 | auth required pam_warn.so
|
|---|
| 434 | auth required pam_deny.so
|
|---|
| 435 | account required pam_warn.so
|
|---|
| 436 | account required pam_deny.so
|
|---|
| 437 | password required pam_warn.so
|
|---|
| 438 | password required pam_deny.so
|
|---|
| 439 | session required pam_warn.so
|
|---|
| 440 | session required pam_deny.so
|
|---|
| 441 |
|
|---|
| 442 | # End /etc/pam.d/other</literal>
|
|---|
| 443 | EOF</userinput></screen>
|
|---|
| 444 |
|
|---|
| 445 | <para>
|
|---|
| 446 | The <application>PAM</application> man page (<command>man
|
|---|
| 447 | pam</command>) provides a good starting point for descriptions
|
|---|
| 448 | of fields and allowable entries. The
|
|---|
| 449 | <ulink url="http://www.linux-pam.org/Linux-PAM-html/Linux-PAM_SAG.html">
|
|---|
| 450 | Linux-PAM System Administrators' Guide
|
|---|
| 451 | </ulink> is recommended for additional information.
|
|---|
| 452 | </para>
|
|---|
| 453 |
|
|---|
| 454 | <important>
|
|---|
| 455 | <para>
|
|---|
| 456 | You should now reinstall the <xref linkend="shadow"/>
|
|---|
| 457 | <phrase revision="sysv">package.</phrase>
|
|---|
| 458 | <phrase revision="systemd"> and <xref linkend="systemd"/>
|
|---|
| 459 | packages.</phrase>
|
|---|
| 460 | </para>
|
|---|
| 461 | </important>
|
|---|
| 462 |
|
|---|
| 463 | </sect3>
|
|---|
| 464 |
|
|---|
| 465 | </sect2>
|
|---|
| 466 |
|
|---|
| 467 | <sect2 role="content">
|
|---|
| 468 | <title>Contents</title>
|
|---|
| 469 |
|
|---|
| 470 | <segmentedlist>
|
|---|
| 471 | <segtitle>Installed Program</segtitle>
|
|---|
| 472 | <segtitle>Installed Libraries</segtitle>
|
|---|
| 473 | <segtitle>Installed Directories</segtitle>
|
|---|
| 474 |
|
|---|
| 475 | <seglistitem>
|
|---|
| 476 | <seg>
|
|---|
| 477 | faillock, mkhomedir_helper,
|
|---|
| 478 | pam_timestamp_check, unix_chkpwd and
|
|---|
| 479 | unix_update
|
|---|
| 480 | </seg>
|
|---|
| 481 | <seg>
|
|---|
| 482 | libpam.so, libpamc.so and libpam_misc.so
|
|---|
| 483 | </seg>
|
|---|
| 484 | <seg>
|
|---|
| 485 | /etc/security,
|
|---|
| 486 | /lib/security,
|
|---|
| 487 | /usr/include/security and
|
|---|
| 488 | /usr/share/doc/Linux-PAM-&linux-pam-version;
|
|---|
| 489 | </seg>
|
|---|
| 490 | </seglistitem>
|
|---|
| 491 | </segmentedlist>
|
|---|
| 492 |
|
|---|
| 493 | <variablelist>
|
|---|
| 494 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
|---|
| 495 | <?dbfo list-presentation="list"?>
|
|---|
| 496 | <?dbhtml list-presentation="table"?>
|
|---|
| 497 |
|
|---|
| 498 | <varlistentry id="faillock">
|
|---|
| 499 | <term><command>faillock</command></term>
|
|---|
| 500 | <listitem>
|
|---|
| 501 | <para>
|
|---|
| 502 | displays and modifies the authentication failure record files.
|
|---|
| 503 | </para>
|
|---|
| 504 | <indexterm zone="linux-pam faillock">
|
|---|
| 505 | <primary sortas="b-faillock">faillock</primary>
|
|---|
| 506 | </indexterm>
|
|---|
| 507 | </listitem>
|
|---|
| 508 | </varlistentry>
|
|---|
| 509 |
|
|---|
| 510 | <varlistentry id="mkhomedir_helper">
|
|---|
| 511 | <term><command>mkhomedir_helper</command></term>
|
|---|
| 512 | <listitem>
|
|---|
| 513 | <para>
|
|---|
| 514 | is a helper binary that creates home directories.
|
|---|
| 515 | </para>
|
|---|
| 516 | <indexterm zone="linux-pam mkhomedir_helper">
|
|---|
| 517 | <primary sortas="b-mkhomedir_helper">mkhomedir_helper</primary>
|
|---|
| 518 | </indexterm>
|
|---|
| 519 | </listitem>
|
|---|
| 520 | </varlistentry>
|
|---|
| 521 |
|
|---|
| 522 | <!-- Removed with the removal of the pam_tally{,2} module
|
|---|
| 523 | <varlistentry id="pam_tally">
|
|---|
| 524 | <term><command>pam_tally</command></term>
|
|---|
| 525 | <listitem>
|
|---|
| 526 | <para>
|
|---|
| 527 | is used to interrogate and manipulate the login counter file.
|
|---|
| 528 | </para>
|
|---|
| 529 | <indexterm zone="linux-pam pam_tally">
|
|---|
| 530 | <primary sortas="b-pam_tally">pam_tally</primary>
|
|---|
| 531 | </indexterm>
|
|---|
| 532 | </listitem>
|
|---|
| 533 | </varlistentry>
|
|---|
| 534 |
|
|---|
| 535 | <varlistentry id="pam_tally2">
|
|---|
| 536 | <term><command>pam_tally2</command></term>
|
|---|
| 537 | <listitem>
|
|---|
| 538 | <para>
|
|---|
| 539 | is used to interrogate and manipulate the login counter file, but
|
|---|
| 540 | does not have some limitations that <command>pam_tally</command>
|
|---|
| 541 | does.
|
|---|
| 542 | </para>
|
|---|
| 543 | <indexterm zone="linux-pam pam_tally2">
|
|---|
| 544 | <primary sortas="b-pam_tally2">pam_tally2</primary>
|
|---|
| 545 | </indexterm>
|
|---|
| 546 | </listitem>
|
|---|
| 547 | </varlistentry>
|
|---|
| 548 | -->
|
|---|
| 549 |
|
|---|
| 550 | <varlistentry id="pam_timestamp_check">
|
|---|
| 551 | <term><command>pam_timestamp_check</command></term>
|
|---|
| 552 | <listitem>
|
|---|
| 553 | <para>
|
|---|
| 554 | is used to check if the default timestamp is valid
|
|---|
| 555 | </para>
|
|---|
| 556 | <indexterm zone="linux-pam pam_timestamp_check">
|
|---|
| 557 | <primary sortas="b-pam_timestamp_check">pam_timestamp_check</primary>
|
|---|
| 558 | </indexterm>
|
|---|
| 559 | </listitem>
|
|---|
| 560 | </varlistentry>
|
|---|
| 561 |
|
|---|
| 562 | <varlistentry id="unix_chkpwd">
|
|---|
| 563 | <term><command>unix_chkpwd</command></term>
|
|---|
| 564 | <listitem>
|
|---|
| 565 | <para>
|
|---|
| 566 | is a helper binary that verifies the password of the current user.
|
|---|
| 567 | </para>
|
|---|
| 568 | <indexterm zone="linux-pam unix_chkpwd">
|
|---|
| 569 | <primary sortas="b-unix_chkpwd">unix_chkpwd</primary>
|
|---|
| 570 | </indexterm>
|
|---|
| 571 | </listitem>
|
|---|
| 572 | </varlistentry>
|
|---|
| 573 |
|
|---|
| 574 | <varlistentry id="unix_update">
|
|---|
| 575 | <term><command>unix_update</command></term>
|
|---|
| 576 | <listitem>
|
|---|
| 577 | <para>
|
|---|
| 578 | is a helper binary that updates the password of a given user.
|
|---|
| 579 | </para>
|
|---|
| 580 | <indexterm zone="linux-pam unix_update">
|
|---|
| 581 | <primary sortas="b-unix_update">unix_update</primary>
|
|---|
| 582 | </indexterm>
|
|---|
| 583 | </listitem>
|
|---|
| 584 | </varlistentry>
|
|---|
| 585 |
|
|---|
| 586 | <varlistentry id="libpam">
|
|---|
| 587 | <term><filename class="libraryfile">libpam.so</filename></term>
|
|---|
| 588 | <listitem>
|
|---|
| 589 | <para>
|
|---|
| 590 | provides the interfaces between applications and the
|
|---|
| 591 | PAM modules.
|
|---|
| 592 | </para>
|
|---|
| 593 | <indexterm zone="linux-pam libpam">
|
|---|
| 594 | <primary sortas="c-libpam">libpam.so</primary>
|
|---|
| 595 | </indexterm>
|
|---|
| 596 | </listitem>
|
|---|
| 597 | </varlistentry>
|
|---|
| 598 |
|
|---|
| 599 | </variablelist>
|
|---|
| 600 |
|
|---|
| 601 | </sect2>
|
|---|
| 602 |
|
|---|
| 603 | </sect1>
|
|---|
